Machine for making decorated paper



" April 5 ,"1921. 1

D. A. SMITH EI'AL MACHINE FOR MAKING bEconAwEn PAPER Filed July 14, 1925 Patented- Apr. 5, 1927.

UNITED STATES PATENT OFF-ICE.

DANIEL SMITH, OF CHEVY CHASE, MARYLAND, AND CHARLES P. STIRLING, OFWASHINGTON, DISTRICT OF COLUMBIA, ASSIGNORS TO DISTRICT OF COLUMBIAPAPER MANUFACTURING COMPANY, 01 WASHINGTON, DISTRICT OF COLUMBIA, A

CORPORATION OF VIRGINIA.

macnmn ron MAKING DECORATED PAPER.

Application filed July 14, 1925. Serial No. 43,515.

The invention relates to the manufacture of printed decorated paper.

One of the objects of the invention 1s the production of decorativepatterns or designs A further object of the invention relates to therpduction of printed decorated paper, w ile the'paper is still in themaking and passing through the paper making machin I The invention ispreferably practiced by employing in a paper making machine a printingattachment comprising an etched or intaglio engraved cylinder, inconnection with an offset roll having a resilient surface, to which thecolor or ink from the etched 0r engraved cylinder is transferred; fromthe transfer roll, the ink is applied to the wet paper sheet during itspassage through the paper making machine.

Printing directly on calendered paper from an engraved design cylinderis well known in the art. It has been found however that printing bydirect contact of the wet paper sheet with an engraved'desi cylinderwill not produce uniform or satisfactory results, but an uneven spottydeposit of color, due to the roughness and unevenness of the papersheet.

In the invention the printing contact is between the plain resilientsurface of the transfer roll and the wet pressed sheet, and thereby itis possible to deposit the color uniformly all over the paper sheetregardless of its rough or uneven surface.

Referring to the drawingfthere are illustrated diagrammatically portionsof a paper making machine to which has been applied the specificprinting attachment for the purpose of carrying out the invention;

The drawing shows press rolls 10 and 11, which convey the felt 12 of apaper-making machine, and which carries the paper sheet 13 from thesheet forming portion of the machine. The rolls 10 and 11 constitutemeans for removing from the paper sheet an excess of. moisture. Thesheet 13 passes over guide rolls Hand 15' to the press rolls 16 and 17,from which it passes to the driers 18 and 19.

When the paper sheet passes around the press roll 17, it is-brought intocontact with the transfer rolls 20 and 21, formed of resilient material,well known in the printing art, or surfaced with resilient material suchas rubber. These transfer rolls carry the .ink or color designs receivedfrom the desig): rolls 22 and 23. The design rolls may formed in anysuitable manner, but it has been found that etched or intaglio engravedcylinders of metal produce the most satisfacs tory results. .It will beunderstoodthat the rolls 22 and 23 are formed with depressionsconstituting pockets for the reception of ink or color in justsufficient quantity to produce the required effects upon the paper, andthat these depressions vary in depth. f

Ink or water color 24 is supplied to the design rolls and wiped bythe-doctors 25 and 26, as is usual in intaglio printing machines. It hasbeen found that water colors or water inks can besuccessfully used with.this invention. The sheet being wet has a tendency to absorb water colorreadily, producing very soft and striking eii'ects.

An accurate control of the color supply is obtained .by the extent ofthe depressions in the intaglio cylinder and by the variations in thedepth thereof. The depth of the depressions controls the quantity ofcolor. The

contact between the metal design cylinder and the resilient surface ofthe transfer roll produces a complete transference of the color to thetransfer roll and at the same time a slight spreading or distribution ofthe color upon the transfer roll. When the whatisclaimedisz- 1. A forproducingdecorated.

pa r comprising in combination, a paper m therefor, the'printingattachment consisting of an intaglio printing press incorporating paper,in combination with a paper making machine comprising means for forminga.

sheet and removing the excess water therefrom, and drying rolls, of'a'printing attachment comprising an engraved metal des' cylinder and aresilient ofi'set roll, the said attachmentbeing located between themeans machine and a printing attachment for removingthe excess water andthe drying rolls. r p

3. A machine for producing decorated paper, in combination with a papermaking machine .comprising means for form ng a sheet and removing theexcess water therefrom, dr ing rolls, and press rolls in advance of therying rolls,- of. a printing attachment comprising an engraved metaldesign roll and a' resi hent oflset roll, mounted adjacent to the saidpress rolls, the said ofi'set;

roll pressing against the paper sheet as it passes around the said pressroll.

In testimony whereof we aflix. our signatures.

DANIEL A. SMITH. v CHARLES ESTIRLING.

